package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;


@Slf4j
@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetMealMapper setMealMapper;

    //新增菜品和口味，两个所以需要添加事务
    @Override
    @Transactional
    public void addDishWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
//        1、新增菜品
        dishMapper.insert(dish);

//        2、需要拿到dish的id
        Long dishId = dish.getId();


//        3、新增口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
//            循环为每一个集合的每一个口味增加dishid
            flavors.forEach(flavor ->{
                flavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }



    }
//分页查询菜品
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }



//    批量删除菜品
@Override
@Transactional
public void delete(List<Long> ids) {

    //        如果菜品起售不能删除
                for (Long id : ids) {
                    Dish dish = dishMapper.getById(id);
                    if (dish.getStatus() == StatusConstant.ENABLE) {
                        throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
                    }
                }


//        如果菜品关联套餐不能删除
                List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
                    if (setmealIds != null && setmealIds.size() > 0) {
                        throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
                    }

                    //        删除菜品
                    for (Long id : ids) {
                        dishMapper.deleteById(id);
                        //删除菜品关联的口味数据

                        dishFlavorMapper.deleteByDishId(id);
                    }
}

// 更改菜品状态
    @Override
    public void updateDishStatus(Integer status, Long id) {
        Dish dish =  Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);

        if (status == StatusConstant.DISABLE) {
            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
            List<Long> dishIds = new ArrayList<>();
            dishIds.add(id);
            // select setmeal_id from setmeal_dish where dish_id in (?,?,?)
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(dishIds);
            if (setmealIds != null && setmealIds.size() > 0) {
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setMealMapper.update(setmeal);
                }
            }
        }


    }

//    根据id查询菜品及其口味
    @Override
    public DishVO getDishByIdWithFlavor(Long id) {
//        需要查询两张表菜品信息和口味信息
        Dish dish = dishMapper.getById(id);

        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

//        封装到vo对象
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;

    }

//    修改菜品信息
    @Override
    public void update(DishDTO dishDTO) {
//        修改菜品基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);

//        修改口味信息
//        首先删除口味信息
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

//        再增加口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
//            循环为每一个集合的每一个口味增加dishid
            flavors.forEach(flavor ->{
                flavor.setDishId(dish.getId());
            });

            dishFlavorMapper.insertBatch(flavors);
        }


    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }




//    根据分类id查询菜品集合
@Override
public List<DishVO> listWithFlavor(Dish dish) {
    List<Dish> dishList = dishMapper.list(dish);

    List<DishVO> dishVOList = new ArrayList<>();

    for (Dish d : dishList) {
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(d,dishVO);

        //根据菜品id查询对应的口味
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

        dishVO.setFlavors(flavors);
        dishVOList.add(dishVO);
    }

    return dishVOList;
}

}
